<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>
</head>
<body>

    <form>
        <label>Name:</label>
        <input name="name" />
        <fieldset>
            <label>Newsletter:</label>
            <input name="newsletter" />
        </fieldset>
    </form>
    <input name="none" />

<script>
    console.log($("form > input"));

    console.log($("form  input"));


</script>

</body>
</html>